<p>
①<img src="http://que-oss.fenziquan.com/web/akimg/images/image2/2017052117231016911.jpg"><br>
一年按365天计,电能损耗为:<img src="http://que-oss.fenziquan.com/web/akimg/images/image2/2017052117232069687.jpg"><br>
输电线上的电压降:<img src="http://que-oss.fenziquan.com/web/akimg/images/image2/2017052117232891241.jpg"><br>
②<img src="http://que-oss.fenziquan.com/web/akimg/images/image2/2017052117214896224.jpg"><br>
电能损耗为:<img src="http://que-oss.fenziquan.com/web/akimg/images/image2/2017052117234357552.jpg"><br>
输电线上的电压降:<img src="http://que-oss.fenziquan.com/web/akimg/images/image2/2017052117235187624.jpg"></p>